Mathematics 9709 · AS & A Level · Coordinate geometry

Coordinate geometry — practice question

The coordinates of the points are A(-3, 7), B(5, 1) and C(-1, k), with k as a constant.

(i)[3]

Since AB = BC, determine the possible values of k.

(ii)[5]

The perpendicular bisector of AB cuts the x-axis at D. Determine the coordinates of D.

Worked solution & mark scheme

This 8-mark question has a full step-by-step worked solution and mark scheme. One marking point: “Shows that AB=10” …